Kingdom Animalia Characteristics Heterotrophs Eukaryotic Multicellular No cell wall, no chloroplasts Motile Sense Organs

9 phyla we will mention Porifera—sponges Cnidaria—jellyfish, sea anemones, coral Platyhelminthes—flatworms Nematoda—roundworms Annelida—earthworms Mollusca—shelled animals Arthropoda—insects, spiders Echinodermata—spiny-skinned Chordata—vertebrates (and others)

Phylum Porifera (sponges) Asymmetrical Pores—filter feeders Not motile (sessile) Provide habitat for other animals Eaten by starfish and some fish Most primitive animal

Phylum Cnidaria (jellyfish, sea anemones, coral) Digestive cavity called a coelenteron Radial symmetry Predators-feed on crustaceans Corals provide important habitat for fish Coral used for decoration and threatened by pollution All have stinging cells

Phylum Platyhelminthes (planarians, tapeworms, flukes) Bilateral symmetry Cephalization- head and brain Acoelomate- no body cavity Incomplete digestive system (one opening) Some are parasites in digestive tract In early 1900’s models ate them to be thin—YUK!

Phylum Nematoda (roundworms) Also called nematodes Complete digestive system-separate mouth and anus (2 openings) Pseudocoelomate Decomposers, predators (bacteria, inverts) Eaten by insects, mice Beneficial to garden by eating insects

Phylum Annelida (segmented worms) i.e. earthworms, leeches True coelom Sensitive to vibrations on ground-rain Prey for robins, shrews, jays, snakes Leeches have cornified knobs to break skin, anticoagulant and anesthetic

Phylum Mollusca (shelled…sometimes) i.e. snails, slugs, clams, mussels, scallops, oysters, octopus and squid Variety in form Giant squid = sea serpent Introduction of garden snails

Slug!

Phylum Arthropoda (jointed legged animals) i.e. insects, spiders and scorpions, shellfish (crustaceans), centipedes (1 pr legs per segment), millipedes (2 pr) Exoskeleton Metamorphosis Pheromones Molting

Phylum Echinodermata (spiny-skinned) i.e. sea stars = starfish, sea urchins Water vascular system Tube feet Important predators

Phylum Chordata (includes the vertebrates) i.e. fish, sharks, amphibians, reptiles, birds, mammals Notochord, nerve cord, gill slits, tail